Home / 13,139.14-18,132.39-7,171.19

Finding the Fourth Proportional to 13,139.14, 18,132.39 and 7,171.19

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Solution

The fourth proportional to 13,139.14, 18,132.39 and 7,171.19 is: 9,896.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.14 : 18,132.39 = 7,171.19 : x
  2. Step 2: Convert to fraction form
    13,139.14/18,132.39 = 7,171.19/x
  3. Step 3: Cross multiply
    13,139.14x = 18,132.39 × 7,171.19
  4. Step 4: Simplify right side
    13,139.14x = 130,030,813.84
  5. Step 5: Solve for x
    x = 130,030,813.84/13,139.14
  6. Step 6: Final answer
    x = 9,896.45

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.